Loot containers
Dryer, Open
Furniture can make your place look pretty but it usually has little defensive value.
Salvage drops
Short Iron Pipe× 1-4
Mechanical Parts× 1-3
Electrical Parts× 1
Extra parts when salvaged with a wrench, ratchet or impact driver.
Drops when destroyed
Iron× 5
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.
Where to find (13 POIs)
Two Bit Tower (tier 5), Atlas Metal Company (tier 3), Bart's Salvage (tier 2), Federal Appliance (tier 2), Mo Power Electronics (tier 2), The Byington Residence (tier 2), Abandoned Shady Shed Farms (tier 1), Camp Deucenhalf (tier 1), Cobweb Cottage (tier 1), Dirty Laundry (tier 1), MoPo-Shack (tier 1), Pass-N-Gas Store #07 (tier 1), The Washington Residence.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.